The research is aimed at study of the probable recovery of iron from the tailings of the Olcon mining company located in the north-western Arctic zone of Russia. Material composition of a sample from a tailings dump was analysed. The authors have developed a separation production technology to recover magnetite-hematite concentrate from …
parameters. Hematite ore's magnetic characteristics were significantlyimpacted by magnetizing roasting. By selectively magnetizing roasting, hematite is transformed into magnetite. With an Fe grade of 65.25% at a recovery value of 72.5% in the concentrate, magnetic separation produced the greatest result for Fe.
The results showed that an iron concentrate with iron grade of 63.04% and total iron recovery of 48.40% was obtained under the optimum roasting conditions: …
Centrifugal concentration provides a means to meet these requirements. It has been reported by Chen et al. in 2006 that an intermittent centrifugal concentrator was able to achieve a 64.39% Fe grade concentrate by reconcentrating a HGMS product assaying 52.20% Fe from fine hematite tailings. This kind of discontinuous centrifugal …
Present investigation includes the magnetizing roasting of low-grade iron ore fines followed by grinding and beneficiation using magnetic separation. The hematite iron ore used in the investigation contains 53.17% T Fe, 10.7% SiO2, and 4.5% Al2O3. Powdered bituminous coal of 210 μm size with an ash content of 12.5% and fixed …
The authors have developed a separation production technology to recover magnetite-hematite concentrate from the tailings. A processing flowsheet includes magnetic separation, milling and gravity concentration methods. The separation technology provides for production of iron ore concentrate with total iron content of 65.9% and recovers …
The hematite and siderite in tailings were transformed into magnetite with an average magnetic conversion rate of 86.46%. ... roasting and magnetic separation process was well recognized to be ...
As shown in Fig. 5, the Fe grades of both the concentrate and tailings decreased with the increasing magnetic field. The yield of tailings also experienced a downward trend as the magnetic field increased, while the concentrate yield increased. The Fe phases of the concentrates were summarized in Table 5. Fe was mainly present …
The burgeoning accumulation of vanadium-titanium magnetite tailings (VTMT) presents a dual challenge of environmental hazard and loss of valuable metal resources. This review arrives at a crucial juncture in global efforts towards a circular economy, focusing on innovative and effective metal recovery technologies. We explore …
diffraction of iron ore tailings are hematite (α-Fe 2 O 3), goethite ( α -FeOOH), and quartz (SiO 2 ). 41,47,55,56 Kaolinite (Si 2 Al 2 O 5 (OH) 4 ) is a mineral commonly associated with
Iron ore tailings (IOTs) are a form of solid waste produced during the beneficiation process of iron ore concentrate. In this paper, iron recovery from IOTs was studied at different points during a process involving pre-concentration followed by direct reduction and magnetic separation. Then, slag-tailing concrete composite admixtures …
Hematite tailings proved to be an efficient fluxing agent in production of porcelain tiles, when used in percentages between 50 and 70%. Water absorption and porosity of the tiles decreased with increase in percentage of mine tailings and a strength up 72.5 MPa was achieved [ 19 ].
C. Li, H. Suna, J. Baic, L. Li, Innovative methodology for comprehensive utilization of iron ore tailings, Part 1, The recovery of iron from iron ore tailings using …
Fluorite compounds in magnetic concentrate were removed by grinding and reverse flotation and a high‐grade iron concentrate was achieved. The performed analyses revealed that the magnetization roasting of LIMS tailings reduced hematite to strong magnetic magnetite and decomposed rare earth minerals into REO.
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The separation technology provides for production of iron ore concentrate with total iron content of 65.9% and recovers 91.0% of magnetite and 80.5% of hematite from the tailings containing 20.4% ...
The concentrate and tailings were then dried, weighed, and utilized for analysis. ... The analysis revealed the presence of five phases in the tailings: goethite …
The extremely small size of hematite segregations and thin intergrowths with quartz can lead to incomplete liberation of hematite …
Production of a high-quality hematite concentrate from initial tailings by reverse cationic flotation. 2. Reverse cationic flotation with iron pre-concentrate produced by gravity separation
The extremely small size of hematite segregations and thin intergrowths with quartz can lead to incomplete liberation of hematite during its grinding and, as a consequence, to the concentration of the mineral in the tailings, and microinclusions of gangue minerals in hematite can significantly reduce the quality of the hematite …
The weak magnetic-strong magnetic separation method is mostly used for the treatment of magnetite-hematite mixed ore. After the weak magnetic separation tailings are concentrated, strong magnetic roughing and sweeping are carried out, and the strong magnetic rough concentrate is concentrated and selected by a strong magnetic …
*Corresponding author: [email protected] Recovery of magnetite-hematite concentrate from iron ore tailings Mikhail Khokhulya1,*, Alexander Fomin1, and Svetlana Alekseeva1 1Mining Institute of Kola Science Center of Russian Academy of Sciences, Apatity, 184209, Russia Abstract. The research is aimed at study of the probable recovery of iron from …
Pulsating high-gradient magnetic separation (PHGMS) of fine hematite from tailings was studied using a pilot PHGMS separator to investigate the possibility of its application in industry. The results of this investigation indicate that PHGMS is effective for recovering fine hematite from the tailings and greatly improved the separation …
The concentrate and tailings both had high mass fractions of oxygen element, while the differences between with iron element and aluminum element were obvious. Moreover, the aluminum element was detected in the map scans of concentrate and tailings. ... The phase transformation indicated that the hematite in tailings …
the tailings are represented by fine-grained liberated material that can be effectively upgraded using magnetizing roasting and magnetic separation into two valuable products, such as iron concentrate and quartz powder. Keywords: hematite; magnetite; iron-bearing waste; beneficiation; recycling; magnetizing roasting; magnetic separation ...
More than 85% of the hematite ore reserves are of medium- to high-grade (+62% Fe) and are directly used in blast furnace and in direct ... Dewatering tests were then conducted on the final concentrate and tailings for selection of thickeners and filters. The final conceptual process flowsheet based on the results of the test work is shown in ...
The authors have developed a separation production technology to recover magnetite-hematite concentrate from the tailings. A processing flowsheet includes magnetic separation, milling and gravity concentration methods. The separation technology provides for production of iron ore concentrate with total iron content of 65.9% and …
Figure 1: Magnetite and hematite concentrator The final tailings assays 12% Fe while the final concentrate is at 66.8% Fe. 1.1 What is the iron recovery to the final concentrate if the feed grade is 35% Fe? 1.2. ... What is the iron content of the spiral tailing? where Sc= Spiral concentrate ST= Spiral tailings Me: Magnetic separator feed 2 MT ...
The end result is a high iron grade magnetite concentrate (+65% Fe), with typically very low impurities. The additional processing cost for the production of magnetite concentrate can be offset by the premium price which it attracts from steel mills because of the high iron content compared to benchmark DSO hematite products.
For example, decreasing the particle size of Cobber tailings from d80 = 290 µm to 75 µm leads to an increase in the iron grade of the concentrate from 26.90 to 30.3%, but the yield of the ...
A new approach for SMR was developed for efficient iron recovery from iron ore tailings. • An iron concentrate with 58.67% Fe at an iron recovery of 57.82% was obtained. • Hematite and siderite were transformed into magnetite during the SMR process. • The SMR reactor showed good performances in terms of operation, control and product.
Case study was proposed: Resource utilization strategy of hematite tailings.. The SiO 2 grade and yield in concentrate respectively reached 95.26% and 42.45%.. High purity SiO 2 grade reached 99.961% after mixed acid leaching.. The mechanisms of S-HGMS and mixed acid leaching were elaborated.
A new approach for SMR was developed for efficient iron recovery from iron ore tailings. • An iron concentrate with 58.67% Fe at an iron recovery of 57.82% was …